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From: Christoph Lameter <cl@gentwo.de>
To: Yafang Shao <laoar.shao@gmail.com>
Cc: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org,
	kafai@fb.com, songliubraving@fb.com, yhs@fb.com,
	john.fastabend@gmail.com, kpsingh@kernel.org, sdf@google.com,
	haoluo@google.com, jolsa@kernel.org, tj@kernel.org,
	dennis@kernel.org, akpm@linux-foundation.org, penberg@kernel.org,
	rientjes@google.com, iamjoonsoo.kim@lge.com,
	roman.gushchin@linux.dev, 42.hyeyoo@gmail.com, vbabka@suse.cz,
	urezki@gmail.com, linux-mm@kvack.org, bpf@vger.kernel.org
Subject: Re: [PATCH bpf-next 2/7] mm: percpu: introduce percpu_size()
Date: Thu, 2 Feb 2023 15:32:54 +0100 (CET)	[thread overview]
Message-ID: <f18a3e-335c-ef3e-b572-73bd651138e4@gentwo.de> (raw)
In-Reply-To: <20230202014158.19616-3-laoar.shao@gmail.com>

On Thu, 2 Feb 2023, Yafang Shao wrote:

> +	bits = end - bit_off;
> +	size = bits * PCPU_MIN_ALLOC_SIZE;
> +
> +	return pcpu_obj_full_size(size);

Dont you have to multiply by the number of online cpus? The per cpu area
are duplicated for those.

  reply	other threads:[~2023-02-02 14:39 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-02-02  1:41 [PATCH bpf-next 0/7] bpf, mm: bpf memory usage Yafang Shao
2023-02-02  1:41 ` [PATCH bpf-next 1/7] mm: percpu: fix incorrect size in pcpu_obj_full_size() Yafang Shao
2023-02-02  1:41 ` [PATCH bpf-next 2/7] mm: percpu: introduce percpu_size() Yafang Shao
2023-02-02 14:32   ` Christoph Lameter [this message]
2023-02-02 15:01     ` Yafang Shao
2023-02-02  1:41 ` [PATCH bpf-next 3/7] mm: vmalloc: introduce vsize() Yafang Shao
2023-02-02 10:23   ` Christoph Hellwig
2023-02-02 14:10     ` Yafang Shao
2023-02-02  1:41 ` [PATCH bpf-next 4/7] mm: util: introduce kvsize() Yafang Shao
2023-02-02  1:41 ` [PATCH bpf-next 5/7] bpf: add new map ops ->map_mem_usage Yafang Shao
2023-02-02  1:41 ` [PATCH bpf-next 6/7] bpf: introduce bpf_mem_alloc_size() Yafang Shao
2023-02-02  4:53   ` kernel test robot
2023-02-02 14:11     ` Yafang Shao
2023-02-02  1:41 ` [PATCH bpf-next 7/7] bpf: hashtab memory usage Yafang Shao
2023-02-04  2:01   ` John Fastabend
2023-02-05  3:55     ` Yafang Shao
2023-02-08  1:56       ` Alexei Starovoitov
2023-02-08  3:33         ` Yafang Shao
2023-02-08  4:29           ` Alexei Starovoitov
2023-02-08 14:22             ` Yafang Shao
2023-02-05 22:14   ` Cong Wang
2023-02-06 11:52     ` Yafang Shao
2023-02-04  2:15 ` [PATCH bpf-next 0/7] bpf, mm: bpf " John Fastabend
2023-02-05  4:03   ` Yafang Shao
2023-02-07  0:53     ` Ho-Ren Chuang
     [not found]     ` <CAOfppAUgB1qtFQfSb7WnGTJ+0fP2NL_T9EJYHgwQyW0mx4vnXA@mail.gmail.com>
2023-02-07  7:02       ` Yafang Shao

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